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Hou W.,Huaqiao University | Hou W.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Guo Z.,Huaqiao University | Guo Z.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | Year: 2014

For some important building structures, the structural strength and displacement are verified to comply with the codes or standards limits during the performance-based seismic design process. The concrete core wall is the most widely used lateral force resisting system in high-rise buildings in China. The bearing capacity, stiffness and ductility must be detailed design to meet the higher seismic requirements. Using Park-Ang damage index D and capacity design method, base on the acceleration-displacement response spectrum and the basic principle of capacity spectrum, a displacement-based on seismic design method of reinforced concrete core walls is proposed. This method is considered to be useful to develop a more rational seismic design method because the method makes it possible to verify the seismic safely of a structure from both the force and the displacement. Given both the target displacement and the target acceleration of the structure, the seismic design is proceed by the proposed method. And the demand strength and displacement are obtained in any design level earthquake. In addition, in order to ensure that the members of the core walls structure have enough plastic deformation capacity, the reinforcement in detail is designed by capacity design method. Source

Zheng Y.,Huaqiao University | Guo Z.,Huaqiao University | Guo Z.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Chai Z.,Huaqiao University | And 2 more authors.
Journal of Natural Disasters | Year: 2014

Aiming at the seismic weakness in stone slabs of stone structures, such as poor integrity and insufficient supporting length, a new retrofitting technique of adding reinforced concrete (RC) inner ring beams to stone walls beneath the stone slabs was proposed. Six specimens with RC inner ring beams casted on the flank were fabricated and subjected to eccentric loadings to investigate the bond performance between stone and RC beams. The researched parameters include the amount and surface characteristic of U-shaped anchor bar and influence of the eccentricity on failure patterns and shear bearing capacity. Test results show that, (1) increasing the amount of the U-shaped anchor bars could effectively increase the shear bearing capacity of the specimens; (2) the specimens using ribbed anchor bars have higher shear capacity than the specimens using plain anchor bars; (3) the shear-bearing capacity of the specimens decreases with the increase of the eccentric distance. Based on the test results and mechanism analysis, a formula to calculate the shear-bearing capacity of the interface between stone and RC beams is proposed. This paper could serve as reference for the retrofit of stone slabs. Source

Guo Z.,Huaqiao University | Guo Z.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Zhang P.,Jiangxi University of Science and Technology | Mei Z.,Huaqiao University | And 5 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

Experiments were conducted to study the seismic behavior of damaged RC frames retrofitted with friction energy dissipation braces (FEDB) under cyclic loading. The performance of this innovative FEDB and the effect of pre-tightening force of the friction damper on seismic performance of retrofitted frames were studied. Based on the test results, the damage characteristic, strength, stiffness and energy dissipation capacity of all specimens were analyzed. The test results indicate that the innovative friction damper has a desirable hysteretic curve with rectangular shape and the performance of the FEDB is stable under cyclic loading. The seismic performance was greatly improved when the damaged RC frames were retrofitted with the FEDB, and the improvement effect increases with the pre-tightening force of friction dampers. The FEDB is the main energy dissipation component in the retrofitted damaged RC frames under seismic loading. This research results can provide reference for retrofitting of damaged RC frames. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved. Source

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